Twin disc conversion. The full kit consists of a Polished bottom RH Leg, disc, Four long hub bolts, Two AP Racing calipers. One (Standard) disc, 2 x sets brake pads and the twin disc braided hose kit incl crossover pipe ( please specify either US or UK bars to get the correct length of hose and model of bike T140, T150 or T160). We can upgrade the discs to the latest drilled and lightened version 37-7175R.POA